Foreword
Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
This document is developed in accordance with the rules given in GB/T 1.1-2020 Directives for standardization - Part 1: Rules for the structure and drafting of standardizing documents.
This document replaces GB/T 14285-2006 Technical code for relaying protection and security automatic equipment. In addition to structural adjustments and editorial changes, the following main technical changes have been made with respect to GB/T 14285-2006:
——The clause "Terms, definitions and abbreviations" has been added (see Clause 3 hereof);
——The subclause "Synchronous compensator protection" has been added (see 5.2.6 hereof);
——The AC relay protection with voltage classes of 750kV and 1,000kV has been added (see 5.3.9 and 5.4.4 hereof);
——The protection of flexible transmission equipment has been added, and the special requirements for the protection of lines with flexible transmission equipment and their adjacent lines have been added (see 5.7.4, 5.8.2.4, 5.8.5, 5.8.6 and 5.4.6 hereof);
——The subclause "Series reactor protection" has been added (see 5.9 hereof);
Introduction
In recent years, with the construction of new energy power generation, UHV AC/DC transmission, flexible AC/DC transmission and distribution, distributed power generation and microgrid projects, the structure and operation characteristics of power grids have changed greatly. At the same time, with the development of economy and society, the demand for power supply reliability is further improved, which puts forward new requirements for relay protection and automatic security control equipment in system design, function configuration, operation setting, inspection and test, etc. The progress of microelectronics technology and network communication technology also provides new technical means for the realization of relay protection and automatic security control equipment, and smart substations based on electronic transformers, circuit breaker’s smart terminals and network transmission have begun to appear, so it is urgent to revise the current standards to ensure the safe and economic operation of power systems.
Technical code for relaying protection and security automatic equipment
1 Scope
This document specifies the general requirements for relay protection and automatic security control equipment for power systems, and the requirements for AC relay protection, DC transmission system protection, automatic security control equipment, related circuits and equipment, etc.
This document is applicable to the research and development, design, manufacture, test, installation, commissioning, operation, maintenance, overhaul, management, etc. of relay protection and automatic security control equipment in power systems with voltage classes of AC 3kV and above and DC ±100kV and above.
2 Normative references
The following documents contain requirements which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 2900.17 Electrotechnical terminology - Measuring relays
GB/T 2900.49-2004 Electrotechnical terminology - Power system protection
GB/T 2900.50 Electrotechnical terminology - Generation, transmission and distribution of electricity - General
GB/T 7409.1 Excitation systems for synchronous electrical machines - Definitions
GB/T 7409.2 Excitation systems for synchronous machines - Part 2: Models for power system studies
GB/T 7409.3 Excitation system for synchronous electrical machines - Technical requirements of excitation system for large and medium synchronous generators
GB/T 14598.24 Measuring relays and protection equipment - Part 24: Common format for transient data exchange (COMTRADE) for power systems
GB/T 14598.26 Measuring relays and protection equipment - Part 26: Electromagnetic compatibility requirements
GB/T 20840.2 Instrument transformers - Part 2: Additional requirements for current transformers
GB/T 20840.3 Instrument transformers - Part 3: Additional requirements for inductive voltage transformers
GB/T 20840.5 Instrument transformers - Part 5: Additional requirements for capacitor voltage transformers
GB/T 20840.7 Instrument transformers - Part 7: Electronic voltage transformers
GB/T 20840.8 Instrument transformers - Part 8: Electronic current transformers
GB/T 22390.5 Control and protection equipment of high-voltage direct current (HVDC) transmission system - Part 5: DC line fault location
GB/T 22390.6 Control and protection equipment of high-voltage direct current (HVDC) transmission system - Part 6: Substation transient fault oscillograph device
GB/T 26216.1 DC current measuring device for HVDC transmission system - Part 1: Electronic DC current measuring device
GB/T 26217 DC voltage measuring device for HVDC transmission system
GB/T 26399 Technical guide for electric power system security and stability control
GB/T 34132 General specification for smart terminal in smart substation
GB/T 37138 Implementation guide for cyber security classified protection of electric power information system
GB 38755 Code on security and stability for power system
GB/T 38969 Guide on technology for power system
GB/T 40599 Technical specification for relay protection and security automatic equipment online monitoring and analysis
GB/T 40864 Technical requirements for relaying protection of flexible alternating current transmission equipment connecting to the system
DL/T 282 Technical requirement for merging unit
DL/T 364 General specification of transmitting protection information on optical channel
DL/T 553 General specification of power system dynamic recording equipment
DL/T 688 Intertripping equipment for power system
DL/T 866 Code for selection and calculation of current transformer and voltage transformer
DL/T 1455 Technical requirements of safety and security for electric power system control software and software testing
DL/T 1782 Information specification of substation relay protection
NB/T 42088 Technical specification for relay protection information system substation
3 Terms, definitions and abbreviations
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 2900.17, GB/T 2900.49-2004 and GB/T 2900.50 and the following apply.
3.1.1
relay protection
an important measure to detect faults or other anomalies in the power system, so as to remove faults, terminate anomalies, or send signals or instructions
[Source: GB/T 2900.49-2004, 448-11-01, modified]
3.1.2
main protection
protection that meets the requirements of power system stability and power equipment safety, and can selectively remove the fault of the protected power equipment or terminate its anomaly at the fastest speed
3.1.3
backup protection
protection that is scheduled to act when the power system fault is not removed or other anomalies are not found within a predetermined time due to inoperability or failure of operation of the main protection or failure of operation of the associated circuit breaker
Note: Backup protection includes local backup protection (3.1.4) and remote backup protection (3.1.5).
[Source: GB/T 2900.49-2004, 448-11-14, modified]
3.1.4
local backup protection
backup protection realized by another protection of the power equipment when the main protection cannot operate or fails to operate; or backup protection realized by circuit breaker failure protection when the associated circuit breaker fails to operate
4 General requirements
4.1 On the premise of reasonable power grid structure, relay protection and automatic security control equipment for power system shall be able to reflect various faults and anomalies of power system, and operate on tripping or give control and alarm signals, so as to meet the requirements of reliability, selectivity, sensitivity and rapidity, and ensure the safe and stable operation of power system and power equipment. Power equipment shall not run without protection at any time.
4.2 When determining the power grid structure, the main wiring of power plants and stations and the operation mode of the system, and selecting power equipment, overall consideration and reasonable arrangement shall be made in accordance with the configuration and operation of relay protection and automatic security control equipment. When the new power equipment is applied for the first time, the adaptability of related relay protection shall be studied. The power grid structure, main wiring of power plants and stations, transformer wiring, power equipment, transformer configuration and system operation mode, which cause relay protection and automatic security control equipment to fail to ensure the safe and stable operation of power system and power equipment, shall be avoided.
Foreword III
Introduction IV
1 Scope
2 Normative references
3 Terms, definitions and abbreviations
3.1 Terms and definitions
3.2 Abbreviations
4 General requirements
5 AC relay protection
5.1 General
5.2 Rotating electrical machine protection
5.3 Power transformer protection
5.4 Line protection
5.5 Busbar protection
5.6 Circuit breaker protection
5.7 Series compensator protection
5.8 Shunt compensator protection
5.9 Series reactor protection
5.10 Others
6 DC transmission system protection
6.1 General
6.2 Protection of single 12-pulse conventional DC transmission system
6.3 Protection of double 12-pulse conventional DC transmission system
6.4 Protection of back-to-back conventional DC transmission system
6.5 Protection of flexible DC transmission system
7 Automatic security control equipment
7.1 General
7.2 Control device for preventing power system instability
7.3 Control device for preventing power system collapse
7.4 Control device for power recovery
7.5 Excitation regulation and control device
7.6 Automatic quasi-synchronizing device
8 Requirements for relay protection and automatic security control equipment and their related circuits and equipment
8.1 General
8.2 Relay protection and automatic security control equipment
8.3 Auxiliary device and auxiliary relay
8.4 Installation methods and panel (cabinet) requirements
8.5 Secondary circuit
8.6 Current transformer and potential transformer
8.7 Circuit breaker and disconnector
8.8 DC power supply
8.9 Communication channel
8.10 Electromagnetic compatibility
9 Fault recording, fault information management and online monitoring and analysis
Annex A (Informative) Relay protection and automatic security control equipment for smart substation
Annex B (Informative) Influence of FACTS equipment on protection of surrounding power equipment and corresponding countermeasures
Annex C (Informative) Relay protection and automatic security control equipment for new energy plants or stations and electrochemical energy storage station
Annex D (Informative) Relay protection and automatic security control equipment for power distribution network and microgrid
Annex E (Informative) Relay protection and automatic security control equipment for industrial/traffic user power supply systems
Annex F (Informative) Protection of conventional DC transmission system
Annex G (Informative) Protection of typical flexible DC transmission system
Bibliography
